--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/alice/test/topology/aquarium/AutoIncrement.java	Wed Apr 16 18:26:07 2014 +0900
@@ -0,0 +1,47 @@
+package alice.test.topology.aquarium;
+
+import alice.codesegment.CodeSegment;
+import alice.datasegment.CommandType;
+import alice.datasegment.Receiver;
+
+public class AutoIncrement extends CodeSegment {
+	
+	private Receiver position = ids.create(CommandType.PEEK);
+	private Receiver number = ids.create(CommandType.PEEK);
+	private static final float MIN = -1.3f;
+	
+	public AutoIncrement(String key, int index) {
+		this.number.setKey("maxsize");
+		this.position.setKey(key, index);
+	}
+
+	@Override
+	public void run() {
+		float max = this.number.asInteger() * 2 - 1 + 0.3f;
+		FishPoint fp = this.position.asClass(FishPoint.class);
+		if (fp.getX() + 0.01 > max) {
+			fp.setXYZ(MIN, fp.getY(), fp.getZ());
+		} else if (fp.getX() + 0.01 < MIN) {
+			fp.setXYZ(max, fp.getY(), fp.getZ());
+		}
+		else {
+			fp.setXYZ(fp.getX() + 0.01f, fp.getY(), fp.getZ());
+		}
+		
+		ods.update(position.key, fp);
+		synchronized (this) {
+			try {
+				// TODO
+				// Waiting should be done in Alice kernel
+				// ids.create(CommandType.WAIT);
+			 
+				wait(20);
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+			}
+		}
+		
+		new AutoIncrement(this.position.key, this.position.index);
+	}
+	
+}